8.0/10 (45 أصوات )




  • مرات التنزيل: 325
  • متطلبات التشغيل:
  • الحجم:
  • الترخيص:
  • الاصدار : 0.4
  • اضيف في: 2011-05-05 00:00:00
  • اخر تحديث: 04/05/2011
  • الموقع علي الانترنت:






Description




Padding is a software that provides padding methods for password based encryption.Append and remove padding to/from a string.I. Functions:appendPadding(str, blocksize=AES_blocksize, mode='CMS'): Pad (append padding to) string for use with symmetric encryption algorithm    Input: (string) str - String to be padded           (int)    blocksize - block size of the encryption algorithm. Usually 8 or 16 bytes           (string) mode - padding scheme one in (CMS, Bit, ZeroLen, Null, Space, Random)    Return:(string) Padded string according to chosen padding moderemovePadding(str, blocksize=AES_blocksize, mode='CMS'):  Remove padding from string  Input: (str) str - String to be padded         (int) blocksize - block size of the algorithm. Usually 8 or 16 bytes         (string) mode - padding scheme one in (CMS, Bit, ZeroLen, Null, Space, Random)  Return:(string) Decrypted string without paddingII. Blocksizes:DES (Triple DES), CAST5 and Blowfish have block size of 64 bits = 8 bytesDES_blocksize = 8CAST5_blocksize = 8Blowfish_blocksize = 8AES has fixed block size of 128 bits = 16 bytes and this is the default blocksizeAES_blocksize = 16III. Mode:MODES ={(0,'CMS')     : 'Pad with bytes all of the same value as the number of padding bytes. Default mode used in Cryptographic Message Syntax (CMS as defined in RFC 5652, PKCS#5, PKCS#7 and RFC 1423 PEM)',(1,'Bit')     : 'BitPadding: Pad with 0x80 (10000000) followed by zero (null) bytes. Described in ANSI X.923 and ISO/IEC 9797-1',(2,'ZeroLen') : 'Pad with zeroes except make the last byte equal to the number (length) of padding bytes',(3,'Null')    : 'Pad with null bytes. Only for encrypting of text data.',(4,'Space')   : 'Pad with spaces. Only for encrypting of text data.',(5,'Random')  : 'ISO 10126 Padding (withdrawn in 2007): Pad with random bytes + last byte equal to the number of padding bytes'       }CMS mode is the default oneExamples in the README.txt file Requirements:

· Python









التعليقات علي Padding 0.4
اضافة تعليق

تعليقات الفيسبوك

تعليقات الموقع